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Six-year-old Robert W. Patch granted a patent for a "toy truck".
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| Number | Title | Issue Date |
| 7549847 | Portable bulk transfer pump with variable speed transmission A portable bulk transfer pump assembly (10) constructed in accordance with the principles of a preferred embodiment of the present invention is configured for transferring fluid (not shown) in bulk. The illustrated portable bulk transfer pump assembly (10 | 06/23/2009 |
| 7348741 | Method and device for controlling fan for cooling vehicle-mounted battery A vehicle which uses an internal combustion engine and a motor generator as drive sources is provided with a battery disposed under a seat and a fan for cooling the battery. Power is exchanged between the motor generator and battery via an inverter. An electronic co... | 03/25/2008 |
| 7281909 | Hybrid compressor system for refrigeration cycle system A compressor device compresses refrigerant of a refrigeration cycle system and is connected to an engine and a motor to selectively receive drive force from one or both of the engine and the motor. When the engine is operated in an idling mode, a control apparatus e... | 10/16/2007 |
| 7278833 | Hybrid compressor A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, a second compression mechanism, which is driven by a second drive source, and a communication path communicating between a suction chamber of the first compression m... | 10/09/2007 |
| 7275735 | Fan drive for fluid cooler with evaporative heat exchanger A cooling tower and/or a fan drive system are provided which enhance cooling performance, are able to reduce lateral temperature gradients at least to some degree, provide for easy removal of debris and/or provide for easy fan adjustment. ... | 10/02/2007 |
| 7261170 | Mobile machine A mobile machine, such as an industrial truck, includes at least two electrical drive systems (4, 5), at least one electrical control system (14) and at least one electrical power source (1). Excess electrical energy generated during deceleratio... | 08/28/2007 |
| 7201010 | Compressor control system for vehicle air conditioner In a compressor control system for a vehicle air conditioner, a hybrid ECU of the vehicle controls a rotation speed of a compressor electric motor. In this case, an output circuit, which outputs a driving signal for driving the compressor electric motor, only needs ... | 04/10/2007 |
| 7163384 | Reciprocating compressor with a linear motor A reciprocating compressor with a linear motor having an actuating means operatively coupling a reciprocating piston to the motor; and a resonant spring means mounted under constant compression to the actuating means by the mutual seating of a pair of supporting sur... | 01/16/2007 |
| 7107776 | Air conditioning system for vehicle An air conditioning system includes a primary or engine-driven compressor that is driven by a primary driving source or engine, and a secondary or motor-driven compressor that is driven by a secondary driving source or motor. The air conditioning system increases in... | 09/19/2006 |
| 7101156 | Method and apparatus for controlling a pumping unit Method and apparatus for reducing the pumping duty cycle of a pump assembly associated with an oil, natural gas, or water well with a concomitant reduction in the wear associated with the pump down hole components. An engine is connected with a pump assembly through... | 09/05/2006 |
| 7021902 | Hybrid compressor A hybrid compressor includes a first compression mechanism, which is driven by a first drive source, and a second compression mechanism, which is driven by a second drive source. A first discharge port of the first compression mechanism and a second discharge port o... | 04/04/2006 |
| 7023167 | Control arrangement for an induction motor compressor having at least three windings, a torque-augmentation circuit a starting capacitor and a resistive element Apparatus for driving a three-phase compressor assembly from a single-phase electrical power supply having first and second power lines, said three-phase compressor assembly comprising a compressor having a rotatable shaft, an electrical motor having a rotatable sha... | 04/04/2006 |
| 6973798 | Air conditioning system for vehicle An air conditioning system 1 includes a primary compressor (an engine-driven compressor 6) driven by a primary driving source (an engine 2) and a secondary compressor (a motor-driven compressor 7) driven by a secondary driving source (a m... | 12/13/2005 |
| 6925823 | Refrigerant cycle with operating range extension A refrigerant cycle is provided with a control that monitors system conditions such as current, voltage or temperature at a compressor motor or refrigerant state conditions at compressor ports. A protection switch on the motor is operable to stop operation of the co... | 08/09/2005 |
| 6685437 | Hydraulic transmission pump assembly having a differential actuation and integrated line pressure control A hydraulic transmission pump assembly includes a pump adapted to provide fluid under pressure to predetermined components in a transmission, an electric motor operatively coupled to the pump, and a line pressure control device in electrical communication... | 02/03/2004 |
| 6551073 | Mobile constant pressure pumping assembly The present invention is an assembly for pumping liquid at a constant, preselected outlet pressure, and includes an engine connected to a variable displacement hydraulic pump driven by the engine. A fixed displacement hydraulic motor driven by the variabl... | 04/22/2003 |
| 6318966 | Method and system for controlling a compressor A system and method for controlling the stage of a compressor motor and/or fan motor of a heating, ventilation, and air-conditioning system. Preferably, said system and method are used with a reversible, two stage compressor motor. The method includes, fo... | 11/20/2001 |
| 6287081 | Control apparatus for hybrid compressor In order to achieve a smooth shift between two drive sources, an electromagnetic clutch is engaged, when the rotation rate of the compression unit and the engine rotation rate match, to switch from motor drive to engine drive during engine startup or engi... | 09/11/2001 |
| 6280147 | Apparatus for adjusting the stroke length of a pump element A metering pump includes an apparatus for adjusting the stroke length of a pump element. The apparatus comprises a lever having a cam which is contacted by the pump element.... | 08/28/2001 |
| 6099259 | Variable capacity compressor For a refrigerant compressor having two capacities, a camming structure operable in different manners depending on direction of crankshaft rotation, to achieve each capacity while providing top dead center piston operation thru the use of a circular cam b... | 08/08/2000 |
| 6059534 | Control system for hydraulic drive A hydraulic drive to, for example, a wheeled excavator comprises two motors (4, 6) connectable to the input side of a gearbox (8) whereby each motor (4, 6) can apply a driving force to a load connected to the output side of the gearbox (8), one motor (6) ... | 05/09/2000 |
| 6041856 | Real-time pump optimization system A system for optimizing progressive cavity pump operation during oil and gas recovery is provided. By strategically disposing a plurality of sensors along the production tubing and sucker rod strings, progressive cavity pump operation and performance may ... | 03/28/2000 |
| 5957668 | Brake actuation means for a rotary pump system A rotary pump system includes a rotary pump, a turbine for driving the pu and a coupling interconnecting a shaft of the turbine and a shaft of the pump. A speed monitoring system determines rotational speed of the pump shaft, is programmed with selected ... | 09/28/1999 |
| 5941305 | Real-time pump optimization system A system for optimizing pump operation during oil and gas recovery is provided. By strategically disposing a plurality of sensors along the production tubing and sucker rod strings, pump operation and performance may be monitored real-time. As an importan... | 08/24/1999 |
| 5934879 | Pump torque control system An engine torque, which corresponds to a target engine speed inputted in a controller, is determined by a functional computing function unit. A torque correction value is added to the engine torque, followed by the multiplication with a constant. The prod... | 08/10/1999 |
| 5928197 | Controlling plunger drives for fluid injections in animals A computer-controlled injector of the type having a motor which advances and retracts a plunger located within a syringe housing toward and away from a nozzle located in the front of the syringe to inject fluid into or out of an animal subject. Manual mot... | 07/27/1999 |
| 5885178 | Electro-hydraulic control means for controlling a hydraulic pressure in a continuously variable loop transmission and the loop transmission containing same The electro-hydraulic control device is designed to control a continuously variable loop transmission including a hydraulic bevel disk displacement device having two pairs of bevel disks, each pair of which has piston/cylinder elements with a piston chamb... | 03/23/1999 |
| 5848877 | Water blasting system with improved pressure control and method The high pressure system 10 is provided for outputting pressurized fluid to a source, such as a blasting gun 26. The system includes mechanical transmission 14 interconnecting a diesel engine 12 with a positive displacement pump 20. A programmable control... | 12/15/1998 |
| 5711483 | Liquid spraying system controller including governor for reduced overshoot A spray controller includes a governor which limits the current applied to an electric motor that operates a spray system pump. The controller accepts pressure sensing and pressure setting signals and provides a pulse train output to drive the motor whene... | 01/27/1998 |
| 5662612 | Controlling plunger drives for fluid injections in animals A computer-controlled injector of the type as a motor which advances and retracts a plunger located within a syringe housing toward and away from a nozzle located in the front of the syringe to inject fluid into or out of an animal subject. The injector t... | 09/02/1997 |
| 5474428 | Oil pump driving device for transmission An oil pump driving device drives an oil pump combined with a transmission coupled to an engine for supplying working oil to lubricate the transmission and enable the transmission to make gear shifts. The transmission includes a first power transmitting m... | 12/12/1995 |
| 5282722 | Electronic pressure control A pressure control loop apparatus for controlling the operation of an electromagnetic clutch in portable spray painting equipment powered by an internal combustion engine having a pressure transducer for sensing the pressure, a manually adjustable pressur... | 02/01/1994 |
| 5261784 | Variable pressure pitot pump A pump (P) including a stationary pump housing (1) and a rotating pump housing (10, 10a) mounted on the stationary pump housing (1) and defining a fluid receiving chamber (11). A pitot probe (5) freely rotatably mounted in the stationary pump housing (1) ... | 11/16/1993 |
| 5251696 | Method and apparatus for variable speed control of oil well pumping units A method and apparatus for Varying the speed of operations of an oil well pumping unit powered by a motor wherein variations in oil viscosity may be efficiently accommodated. An oil well pumping unit which includes a submersible pump actuated by means of ... | 10/12/1993 |
| 5197860 | Hydraulic apparatus for construction machines A hydraulic apparatus for a construction machine, which is adapted to prevent the number of revolutions of an engine from increasing when the flow of the fluid discharged by a variable displacement hydraulic pump driven by the engine is cut off. The hydra... | 03/30/1993 |
| 5046924 | Process and circuit arrangement for controlling a consumer driven by an internal combustion engine A method for controlling a consumer driven by an internal combustion engine 1 is suggested, especially a compressor 2 of an air-conditioning system of a motor vehicle, in which before the compressor is put into operation, the power output of the internal ... | 09/10/1991 |
| 4925370 | Electric motor driven pump with an automatic transmission A pumping system includes a pump for pumping a liquid, a motor for driving the pump, and components for coupling the pump to the motor so that the speed at which the pump is driven varies automatically according to the load the liquid imposes. One embodim... | 05/15/1990 |
| 4913624 | Low pulsation displacement pump A low pulsation displacement pump has a pair of plungers and motor driven-cams or feed screws for reciprocating the plungers. In order to cause the pump to stably discharge a liquid so that variation in discharge due to machining errors of the plungers or... | 04/03/1990 |
| 4493613 | Oil well pump drive An oil pump assembly having an adjustable production rate and capable of long stroke, low stroke per minute pumping rates, comprising a reciprocating pumping rod in a well hole, a counterbalancing mechanism for reducing the power needed to pump oil by the... | 01/15/1985 |
| 4484861 | Method and apparatus for process control of vertical movement of slurried particulates A process control system for use in movement of slurry material from a first lower level through a vertical flow way to an upper or surface level. In particular, this system is utilized for moving slurried particulate from a subterranean mine level upward... | 11/27/1984 |
